黄石国家公园里的上间歇泉盆地,美国怀俄明州 (© Ray Urner/Tandem Stills + Motion)

答:

Hi Daniel: This is kind of a loaded question. That is if you are to go directly from Old Faithful up to the Morning Pool (near the end of the upper geyser basin) it is 1.5 miles. Depending on how often you stop, how fast you walk, will determine the amount of time you need. My opinion, give this ENTIRE walk (you can find a trail map of the area online search, or even here in Trip Advisor) about 3 hours. I enjoy photography and there are many places for picture taking. Early morning is the BEST time to go- less crowds. Better yet, going to Yellowstone during the shoulder seasons, less heat, less crowds altogether. This is what we found. If going in summer- definitely hit this area EARLY. Whatever you do, if you can, spend a couple days in the Old Faithful area, you will not be board or without things to do and see.